This video shows that, when you work in a laboratory, inoffensive office pranks can turn into brutal weapons of selective destruction and contusion. Like this insane pneumatic cannon. This is how they say they did it:

These guys—including the victim—have been breathing weird gases for too long. Or maybe the whole thing is a prank on us, and this is a very clever CGI. Either way, I bow to their ingenuity and skill and their weird gas inhalation powers.